By cons, it's my first watch with a movement Valgranges or 7750, and actually when the wrist is moving, we hear quite like a ball that moves inside the case. We know like that that the rotor is not stuck !!!

And I like it in black version, better than white especially at the level of different subdials. In addition, I always preferred the leather bracelets (even if we must change them after a while). I already have a Victorinox Quartz watch with steel bracelet and it weighs a dead donkey.